Nathalia Helena Secol Mattos

@lagesed.geologia.ufrj.br

Laboratório de Geologia Sedimentar - Lagesed
Universidade Federal do Rio de Janeiro

Nathalia Helena Secol Mattos


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https://researchid.co/mattosnh

RESEARCH, TEACHING, or OTHER INTERESTS

Geology, Geophysics, General Earth and Planetary Sciences
25

Scopus Publications

Scopus Publications

  • Petroelastic characterization of a carbonate reservoir in the Santos Basin, southeast Brazil
    Nathalia H. Mattos, Taynah B. Rebelo, Emilson P. Leite, Rafael A. Cataldo
    Interpretation, 2025
    The Barra Velha Formation (BVF) carbonates are the most prolific hydrocarbon producers in the Santos Basin, southeast Brazil. Due to diagenesis and recurring cycles of dissolution and cementation, the highly heterogeneous nature of this interval poses a challenge in characterizing the reservoir quality and recovery of hydrocarbons. To identify the vertical and lateral distribution of the presalt BVF carbonates and assess areas where the fluid flow is limited, we develop a petroelastic facies (PF) classification model based on high-quality well data constrained by rock-physics templates (RPTs). The RPTs allow the discrimination of high-porosity carbonates from medium porosity and tight carbonates. Then, we correlate the PF with BVF lithofacies described from thin sections and core data sets to check whether it is feasible to propagate the PF into a 3D model. The BVF is subdivided into three formation intervals (BVE-100, BVE-200, and BVE-300), based on the geometry of their internal seismic reflections. A model-based constrained spike-sparse inversion is performed using a high-quality ocean-bottom node seismic data set. Shalier PF is isolated from porous carbonates by applying the carbonate-shale indicator attribute. We integrate the PF classification with the outputs from the inversion to aid in characterizing the reservoir through a Bayesian classification. Probabilistic volumes allowed for the 3D spatial distribution of PF to be consistent with seismic data. This further favors the petroelastic model as an effective method for assessing the distribution of the most prone reservoir intervals in carbonate-bearing sedimentary basins.
  • The influence of diagenetic conditions and fault zones on karstification development in the Barra Velha Formation (Aptian of Santos Basin, Brazil)
    Maurícius Nascimento Menezes, Patrick Führ Dal’ Bó, Jon J. Smith, Nathalia H. Mattos, Carolina Ribeiro, Michele Arena, Hélisson N. dos Santos, Gustavo Luiz Campos Pires, Pedro Watahe, Leonardo Borghi
    Marine and Petroleum Geology, 2025
  • Seismic Interpretation on OBN and Streamer Datasets - Implications for Quantitative Analysis and Structural Models
    N. Mattos, F. Nepomuceno, F. Neves, C. Ribeiro, G. Raitz, M. Arena, L. Borghi
    4th Eage Conference on Pre Salt Reservoir, 2024
  • Depositional, Diagenetic, and Tectonic Setting of Aptian Pre-salt Carbonate Reservoir in the Santos Basin, Brazil
    M. Menezes, P. Dal’ Bó, J. Smith, N. Mattos, C. Riberio, M. Arena, L. Borghi
    4th Eage Conference on Pre Salt Reservoir, 2024
  • Lithology Identification with Well Logs Using Machine Learning: a Case Study in Brazilian Pre - Salt
    G. Raitz, N. Mattos, C. Ribeiro, M. Arena, J. Favoretto, J. Santos, H. Santos, F. Neves, L. Borghi
    4th Eage Conference on Pre Salt Reservoir, 2024
  • Mineralogical Modeling and Petrophysical Properties of the Barra Velha Formation, Santos Basin, Brazil
    Marta H. Jácomo, , Gelvam A. Hartmann, Taynah B. Rebelo, Nathália H. Mattos, Alessandro Batezelli, Emilson P. Leite, , , , , and
    Petrophysics, 2023
    The Santos Basin, offshore Brazil, has the most significant petroleum carbonate reservoir province in South America. The presalt carbonates reservoirs of the Barra Velha Formation (BVF) present a complex mineralogic distribution and heterogeneous physical properties, making it challenging to construct a reliable mineralogical model. Understanding rock mineralogy is important to petroleum prospects and the study of porous media, besides calibrating seismic facies. In this paper, we present a mineralogical inversion procedure to model reservoir and nonreservoir intervals within the BVF in a presalt field applying multicomponent inversion. The uppermost 15 to 28 m of the BVF, known as “Lula Fingers,” present higher values of gamma ray when compared with deeper intervals and are characterized by high modeled dolomite contents. Below the Lula Fingers region, the Upper BVF can be divided into BVF100 (top), which is characterized by low gamma ray values just above the BVF200 (bottom). They are formed mainly by shrub and spherulite-rich in-situ facies with fewer clay and Mg-clays contents, which are often replaced by dolomite and quartz. The bottom part of Upper BVF (BVF200) presents a microporous Mg-clay-rich interval, mainly in the structural flanks region, or a macroporous Mg-clay-poor interval, mainly in high levels. The present model fits well with the stratigraphic interval and allows a better understanding of the mineralogical distribution over the entire BVF100 and BVF200, particularly the lateral mineralogical variability in regions with structural highs and flanks.
  • Sedimentary processes and paleoenvironment reconstruction of the Barra Velha formation, Santos Basin, Brazilian pre-salt
    Taynah Buratto Rebelo, Alessandro Batezelli, Nathalia Helena Mattos, Emilson Pereira Leite
    Marine and Petroleum Geology, 2023
    The Barra Velha carbonates are widely known for their complexity regarding facies, diagenetic features, and depositional history. The absence of recent analogues representing the depositional setting of these rock formations leaves many uncertainties concerning the sedimentary process that generated them. The present work aims to propose a model for the depositional environment of the Barra Velha Formation based on sedimentary features identified through facies description and interpretation. The employed data consists of 645 m of core descriptions, 2300photomicrographs, 1201 plug samples, and 44 thin sectionsdistributed throughout 34 wells in two Santos Basin oil fields. Fourteen facies were identified and classified into four categories: in situ, microbial, reworked, and altered. The in situ facies are composed of spherulites , shrubs, and mud. Sedimentological evidence points out that spherulites and shrubs precipitated within layers of mud, as a post depositional process . Microbial facies have several characteristics that refer to stromatolites and occur laterally and vertically associated with in situ facies. The spatial association between them indicates that in situ and microbial facies formed in the lower energy portions of the lake. Reworked facies were formed by grain fragmentation and transportation, indicating an energetic lake-littoral zone, where grainstones and packstones formed in the shallowest portions, and wackestones formed in the less energetic portion of the littoral zone. The altered category comprises the weathering profiles . These profiles resemble soils and developed in response to periods of strong evaporation, when lake brines would become dense enough to infiltrate into the groundwaters, leading to the precipitation of the dolocretes in the mixing zone. The spatial distribution of the facies corroborates the sedimentological interpretations. In situ and microbial facies are frequently found in the structurally lower regions of the study area. In contrast, reworked facies and weathering profiles are more common on structural highs.
  • Stratigraphic record of continental breakup, offshore NW Australia—Discussion
    Tiago M. Alves, Marcos Fetter, Cathy Busby, Tiago A. Cunha, Nathalia H. Mattos
    Basin Research, 2023
    Reeve et al. (2022) address the stratigraphic record of continental breakup by focusing on a set of stratigraphic unconformities from a proximal sector of the NW Australian continental margin, inboard from the Exmouth Plateau. They suggest that such unconformities can potentially document a well‐defined three‐stage process: end of the syn‐rift phase, formation of a wide continent‐ocean transition zone (COTZ) and generation of ‘true’ Penrose‐type oceanic crust. We counterargue that continental breakup is a protracted event that can only be understood via seismic‐ and chronostratigraphic correlations of strata, and their composing sequences, across and along rifted margins. Tying proximal stratigraphic unconformities to magnetic anomalies outboard from the study area in Reeve et al. (2022) is open to question. In parallel, we suggest that age resolutions of ca. 1 Ma are not achievable using the micropaleontological data presented in Reeve et al. (2022), with an important reworking of microfossil assemblages potentially occurring during the erosional process forming local and regional unconformities. Our discussion addresses these points in more detail.
  • Machine learning petroelastic facies classification in a complex carbonate reservoir from Santos Basin, Brazil
    84th Eage Annual Conference and Exhibition, 2023
  • Depth-variant pore type modeling in a pre-salt carbonate field offshore Brazil
    Rafael A. Cataldo, Emilson P. Leite, Taynah B. Rebelo, Nathalia H. Mattos
    Frontiers in Earth Science, 2022
    Brazilian pre-salt carbonates encompass more than 70% of the total oil and gas produced in the country nowadays and yet, present several challenges such as heterogeneous composition in mineralogy with the presence of Mg-clays, a complex pore network and diagenetic processes, e.g., dolomitization, silicification and cementation. Rock physics provides a powerful route to understand the elastic behavior of rocks by connecting geology and geophysics. It is known that pore type determination is crucial to understand this behavior. In this paper, we propose a workflow that integrates several methods to obtain depth-variant distribution of pore types and their respective volumes for seven wells in the carbonate-bearing Barra Velha Formation interval. We compared the modeling results with thin sections, performed sensitivity analysis with several parameters (e.g., mineral content, saturation, different aspect ratios) to verify the impact of each one and, analyzed results with hydraulic flow units to search for favorable porosity-permeability scenarios and their relationship with the different pore types. Results suggest that the key parameters impacting the elastic behavior are mineralogy and pore types. Also, compliant pore type may act as connectors between pores with bigger storage capacity, such as reference and stiff pore types. The proposed workflow contributes to understand these complex carbonates, by providing a feasible path to obtain three pore type distributions for each depth point. Calibration with fluid data and especially mineralogy, is essential for the predictions to be as trustworthy as possible and should be applied for each well with available information.
  • Impact of mineralogy on rock physics modeling: a Brazilian pre-salt case study
    Rafael Amaral Cataldo, Emilson Pereira Leite, Nathalia Helena Secol Mattos
    Seg Technical Program Expanded Abstracts, 2022
  • Analysis of a basement fault zone with geothermal potential in the Southern North Sea
    Tiago M. Alves, Nathalia H. Mattos, Sarah Newnes, Sinéad Goodall
    Geothermics, 2022
  • Flow units in complex carbonate reservoirs: A study case of the Brazilian pre-salt
    T.B. Rebelo, A. Batezelli, N.H.S Mattos, E.P. Leite
    Marine and Petroleum Geology, 2022
  • WEATHERING-RELATED FEATURES AND VUGGY POROSITY GENERATION IN THE LULA'S FINGERS INTERVAL - BRAZILIAN PRESALT
    83rd Eage Conference and Exhibition 2022, 2022
  • Quantitative inference of reservoir porosity and flow units in the Brazilian pre-salt
    83rd Eage Conference and Exhibition 2022, 2022
  • SEISMIC STRATIGRAPHY AND STRUCTURAL ANALYSIS OF THE PRE-SALT OF SANTOS BASIN AND IMPLICATIONS ON BASIN EVOLUTION
    82nd Eage Conference and Exhibition 2021, 2021
  • Significance of Upper Triassic to Lower Jurassic salt in the identification of palaeo-seaways in the North Atlantic
    Olivia A. Walker, Tiago M. Alves, Stephen P. Hesselbo, Tim Pharaoh, M. Nuzzo, Nathalia H. Mattos
    Marine and Petroleum Geology, 2021
  • A tectono-stratigraphic review of continental breakup on intraplate continental margins and its impact on resultant hydrocarbon systems
    Tiago Alves, Marcos Fetter, Cathy Busby, Rogerio Gontijo, Tiago A. Cunha, Nathalia H. Mattos
    Marine and Petroleum Geology, 2020
  • Structural and depositional controls on Plio-Pleistocene submarine channel geometry (Taranaki Basin, New Zealand)
    Nathalia H. Mattos, Tiago M. Alves, Aisling Scully
    Basin Research, 2019
  • Source-area, paleoweathering and provenance of the late cretaceous sequences of the Bauru Basin (Se Brazil)
    Nathalia Helena Secol MATTOS, Alessandro BATEZELLI
    Geociencias, 2019
  • Corridors of crestal and radial faults linking salt diapirs in the Espírito Santo Basin, SE Brazil
    Nathalia H. Mattos, Tiago M. Alves
    Tectonophysics, 2018
  • Strike-Slip Tectonics in the SW Barents Sea During North Atlantic Rifting (Swaen Graben, Northern Norway)
    K. O. Omosanya, I. Zervas, N. H. Mattos, T. M. Alves, S. E. Johansen, G. Marfo
    Tectonics, 2017
  • Does the evolution of salt structures interconnect different fault families in the Espírito Santo Basin?
    N.H. Mattos, T.M. Alves
    79th Eage Conference and Exhibition 2017, 2017
  • Crestal fault geometries reveal late halokinesis and collapse of the Samson Dome, Northern Norway: Implications for petroleum systems in the Barents Sea
    Nathalia H. Mattos, Tiago M. Alves, Kamaldeen O. Omosanya
    Tectonophysics, 2016
  • Provenance and source area weathering of bauru group of west Minas Gerais State (Brazil)
    Comunicacoes Geologicas, 2014